Dienes blocks is used for_________

Dienes blocks are a manipulative tool used to teach a variety of mathematical concepts, including addition and subtraction. They are particularly helpful for students to visualize and understand these concepts concretely.
Key Points

• Addition: Dienes blocks can be used to represent different quantities and visually demonstrate the process of combining them.
• Subtraction: Similarly, Dienes blocks can be used to represent quantities and then remove some to model subtraction. This helps students understand the concept of taking away from a whole.

Therefore, Dienes blocks are valuable tools for teaching both addition and subtraction, making 3) Both of the above the correct answer.